| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D000608.7 | TWP/C2/SMET Wind Speeds | twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1 |
| D000608.8 | TWP/C2/SMET Wind Speeds | twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1 |
| D000608.9 | TWP/C2/SMET Winds Speeds | twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1 |
| D000613.2 | TWP/C2/SMET Temperature spike | twpsmet60sC2.a1, twpsmet60sC2.b1 |
| D000613.3 | TWP/C2/SMET - Pressure sensitivity to rain | twpsmet60sC2.a1, twpsmet60sC2.b1 |
| D000613.4 | TWP/MWR/C2 - Data gaps | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
| D000615.1 | TWP/MWR/C2 - Data Gaps | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
| D010227.4 | TWP/MWR/C2 - excessive flagging of data | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
| D010227.5 | TWP/MWR/C2 - excessive flagging of data | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
| D010503.2 | TWP/MWR/C2 - excessive flagging of data | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
| D020329.8 | TWP - Switch to new Data Header Formats not timely | twpmfrsrC2.00, twpmfrsrC2.a0, twpmfrsrC2.a1, twpmfrsrC2.b1, twpmwrlosC2.a1, twpmwrlosC2.b1, twpsmet60sC1.00, twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC2.a1, twpsmet60sC2.b1, twpgndrad60sC2.a1, twpgndrad60sC2.b1, twpskyrad20sC2.a1 |
| D020613.7 | TWP/C2 Installation | twpmwrlosC2.a1, twpmwrlosC2.b1 |
| D020613.9 | TWP/C2 Installation | twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1 |
| D030822.10 | TWP/MWR/C2 - min/max/delta values incorrect | twpmwrlosC2.b1 |
| D040726.1 | TWP/SMET/C2 - Negative rainfall rates | twpsmet60sC2.b1 |
| D060420.10 | TWP/MWR/C2 - software upgrade (version 3.29) | twpmwrlosC2.a1, twpmwrlosC2.b1 |
| D060818.2 | TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPa | twpsmet60sC2.b1 |
| D990107.1 | TWP/MWR/C2 - Reprocess: Software Change | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC1.a1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/24/1998 | 0000 | 01/08/1999 | 2100 |
| Subject: | TWP/C2/SMET Wind Speeds |
| DataStreams: | twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1 |
| Description: | Beginning on December 24, Anemometer #1 (there are two anemometers on the SMET stand) occasionally reported wind speed values that were low relative to the other sensor. It is clear from the data that the low reading here is the anomalous one. |
| Measurements: | twpsmetC2.00:
twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/09/1999 | 2300 | 01/10/1999 | 0600 |
| Subject: | TWP/C2/SMET Wind Speeds |
| DataStreams: | twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1 |
| Description: | Beginning on December 24, Anemometer #1 (there are two anemometers on the SMET stand) occasionally reported wind speed values that were low relative to the other sensor. It is clear from the data that the low reading here is the anomalous one. |
| Measurements: | twpsmetC2.00:
twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/14/1999 | 1430 | 01/14/1999 | 2100 |
| Subject: | TWP/C2/SMET Winds Speeds |
| DataStreams: | twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1 |
| Description: | Beginning on December 24, Anemometer #1 (there are two anemometers on the SMET stand) occasionally reported wind speed values that were low relative to the other sensor. It is clear from the data that the low reading here is the anomalous one. |
| Measurements: | twpsmetC2.00:
twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/03/1998 | 2105 | 12/03/1999 | 2105 |
| Subject: | TWP/C2/SMET Temperature spike |
| DataStreams: | twpsmet60sC2.a1, twpsmet60sC2.b1 |
| Description: | There was a brief -4 C spike in the temperature at approximately 21.5 Z on December 3. This spike also showed up in the vapor pressure which is calculated from the temperature and relative humidity. |
| Measurements: | twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/20/1998 | 0000 | 12/31/1998 | 2359 |
| Subject: | TWP/C2/SMET - Pressure sensitivity to rain |
| DataStreams: | twpsmet60sC2.a1, twpsmet60sC2.b1 |
| Description: | The pressure behaves anomalously during rain events - even very mild ones. Normally, the pressure undergoes a smooth semi-diurnal oscillation with little higher frequency variability. However, during and shortly after rain events, the pressure signal exhibits abrupt changes - this sort of behavior has occasionally been observed at Manus but not with the regularity seen here. Examples of this behaviour occur on (date in the form YYYYMMDD): 19981212 19981215 19981216 19981217 19981223 19981224 19981225 19981230 19981231 |
| Measurements: | twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/23/1998 | 0000 | 11/23/1998 | 1900 |
| Subject: | TWP/MWR/C2 - Data gaps |
| DataStreams: | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
| Description: | Data missing |
| Measurements: | twpmwrlosC2.b1:
twpmwrlosC2.a1:
twpmwrtipC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/01/1998 | 1800 | 12/01/1998 | 2359 |
| Subject: | TWP/MWR/C2 - Data Gaps |
| DataStreams: | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
| Description: | Data missing |
| Measurements: | twpmwrlosC2.b1:
twpmwrlosC2.a1:
twpmwrtipC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/16/1999 | 0900 | 03/08/1999 | 2100 |
| Subject: | TWP/MWR/C2 - excessive flagging of data |
| DataStreams: | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
| Description: | The wet_window flag is set high more than expected from the measured value of liquid water path. This may be caused by dew or, if the heater sensivity is slightly misadjusted, by the diurnal variation in ambient temperature. The "wet_window" flag is an indicator of moisture on the MWR window which invalidates the measurements of precipitable water vapor and liquid water path. Sometimes this flag can be incorrectly set high or low if the heater sensivity is slightly misadjusted. The heater adjustment is a resistive device that is dependent on ambient temperature. Another indicator of moisture on the window is unreasonably high ( > 3*liquid_retrieval_rms_accuracy ) values of "liq". |
| Measurements: | twpmwrlosC2.b1:
twpmwrlosC2.a1:
twpmwrtipC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/16/1999 | 0900 | 02/09/2000 | 2100 |
| Subject: | TWP/MWR/C2 - excessive flagging of data |
| DataStreams: | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
| Description: | The wet_window flag is set high more than expected from the measured value of liquid water path. This may be caused by dew or, if the heater sensivity is slightly misadjusted, by the diurnal variation in ambient temperature. The "wet_window" flag is an indicator of moisture on the MWR window which invalidates the measurements of precipitable water vapor and liquid water path. Sometimes this flag can be incorrectly set high or low if the heater sensivity is slightly misadjusted. The heater adjustment is a resistive device that is dependent on ambient temperature. Another indicator of moisture on the window is unreasonably high ( > 3*liquid_retrieval_rms_accuracy ) values of "liq". |
| Measurements: | twpmwrlosC2.b1:
twpmwrlosC2.a1:
twpmwrtipC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/07/2000 | 0000 | 12/17/2000 | 2359 |
| Subject: | TWP/MWR/C2 - excessive flagging of data |
| DataStreams: | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC2.a1 |
| Description: | The wet_window flag is set high more than expected from the measured value of liquid water path. This may be caused by dew or, if the heater sensivity is slightly misadjusted, by the diurnal variation in ambient temperature. |
| Measurements: | twpmwrlosC2.b1:
twpmwrlosC2.a1:
twpmwrtipC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/31/2001 | 2359 | 04/01/2001 | 0020 |
| Subject: | TWP - Switch to new Data Header Formats not timely |
| DataStreams: | twpmfrsrC2.00, twpmfrsrC2.a0, twpmfrsrC2.a1, twpmfrsrC2.b1, twpmwrlosC2.a1, twpmwrlosC2.b1, twpsmet60sC1.00, twpsmet60sC1.a1, twpsmet60sC1.b1, twpsmet60sC2.a1, twpsmet60sC2.b1, twpgndrad60sC2.a1, twpgndrad60sC2.b1, twpskyrad20sC2.a1 |
| Description: | On April 1, 2001 at 00:00:00 new data header with consistent variable naming conventions, etc were to be used for all sites, all data streams. At the TWP sites the time of the movement to the new convention did not occur precisely at 00:00:00. The following data files contain between 40 seconds and 20 minutes of data from 4/1/02 in the old format. The delayed format change did not affect data quality in any way. twpgndrad60sC2.a1.20010401.000000.cdf twpgndrad60sC2.b1.20010401.000000.cdf twpmfrsrC2.a0.20010401.000000.cdf twpmfrsrC2.b1.20010401.000000.cdf twpmwrlosC2.a1.20010401.000008.cdf twpmwrlosC2.b1.20010401.000008.cdf twpskyrad20sC2.a1.20010401.000001.cdf twpsmet60sC1.a1.20010401.000001.cdf twpsmet60sC1.b1.20010401.000001.cdf twpsmet60sC2.a1.20010401.000000.cdf twpsmet60sC2.b1.20010401.000000.cdf |
| Measurements: | twpsmet60sC1.b1:
twpgndrad60sC2.b1:
twpmfrsrC2.00:
twpmfrsrC2.b1:
twpgndrad60sC2.a1:
twpmfrsrC2.a0:
twpsmet60sC1.a1:
twpmwrlosC2.b1:
twpskyrad20sC2.a1:
twpmwrlosC2.a1:
twpmfrsrC2.a1:
twpsmet60sC2.b1:
twpsmet60sC1.00:
twpsmet60sC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/28/1998 | 0140 | 11/19/1998 | 2359 |
| Subject: | TWP/C2 Installation |
| DataStreams: | twpmwrlosC2.a1, twpmwrlosC2.b1 |
| Description: | The Nauru ARCS was installed during the period September-November 1998. Data were being collected by the end of October, but for the first several weeks of November, the site was undergoing considerable change, so data from that period should be used with caution. The official site dedication occured on November 20. Most on-site activity ended following the dedication so we will consider November 20 to be the beginning of the Nauru operations. The last members of the installation team left Nauru on November 24. |
| Measurements: | twpmwrlosC2.b1:
twpmwrlosC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/21/1998 | 0312 | 11/19/1998 | 2359 |
| Subject: | TWP/C2 Installation |
| DataStreams: | twpsmetC2.00, twpsmet60sC2.a1, twpsmet60sC2.b1 |
| Description: | The Nauru ARCS was installed during the period September-November 1998. Data were being collected by the end of October, but for the first several weeks of November, the site was undergoing considerable change, so data from that period should be used with caution. The official site dedication occured on November 20. Most on-site activity ended following the dedication so we will consider November 20 to be the beginning of the Nauru operations. The last members of the installation team left Nauru on November 24. |
| Measurements: | twpsmetC2.00:
twpsmet60sC2.b1:
twpsmet60sC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/28/1998 | 0000 | 02/08/2003 | 2359 |
| Subject: | TWP/MWR/C2 - min/max/delta values incorrect |
| DataStreams: | twpmwrlosC2.b1 |
| Description: | The values of valid_min, valid_max, and valid_delta for fields tkxc and tknd were incorrect. They should be 303, 333, and 0.5 K, respectively. |
| Measurements: | twpmwrlosC2.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/21/1998 | 0311 | 07/06/2004 | 0138 |
| Subject: | TWP/SMET/C2 - Negative rainfall rates |
| DataStreams: | twpsmet60sC2.b1 |
| Description: | Due to limitations of the Zeno dataloggers all voltage measurements from the optical rain gauge (ORG) were converted to rainfall rates. This resulted in negative values for rain rates. Any value below 0.10 mm/hr should be considered to be 0 mm/hr. New dataloggers alleviated this problem. |
| Measurements: | twpsmet60sC2.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/28/1998 | 0000 | 07/30/1999 | 1200 |
| Subject: | TWP/MWR/C2 - software upgrade (version 3.29) |
| DataStreams: | twpmwrlosC2.a1, twpmwrlosC2.b1 |
| Description: | The MWR operating program was upgraded to version 3.29 on 30 July 1999. This version includes a beam width correction as well as providing the capability to automatically level the elevation mirror (that is, to automatically detect and correct offsets in the elevation angle stepper motor position.) The improvement in the quality of the tip curves resulting from the auto-leveling has been dramatic: differences in the brightness temperatures at 3 airmasses (19.5 and 160.5 degrees) have been reduced from +/- 5 K to +/- 0.5 K. In order to take full advantage of this improvement to detect and reject cloudy tip curves, the minimum value of the goodness-of-fit coefficient for a valid tip curve has been increased from 0.995 to 0.998. |
| Measurements: | twpmwrlosC2.b1:
twpmwrlosC2.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/21/1998 | 0000 | 07/13/2006 | 2232 |
| Subject: | TWP/SMET/C2 - Reprocess: Barometric Data Changed from hPa to kPa |
| DataStreams: | twpsmet60sC2.b1 |
| Description: | Barometric pressure data was converted from hPa to kPa in order to standardize the measurement units among ARM sites and to conform to accepted standard units determined by the scientific community. |
| Measurements: | twpsmet60sC2.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/28/1998 | 0000 | 11/19/1998 | 0500 |
| Subject: | TWP/MWR/C2 - Reprocess: Software Change |
| DataStreams: | twpmwrlosC2.a1, twpmwrlosC2.b1, twpmwrtipC1.a1 |
| Description: | The MWR operating software was changed on 19 November 1998 to provide additional functionality as described below. This change affects the format of the raw and ingested data. NEW FEATURES 1. Faster sampling rate Standard line-of-sight (LOS) observations can now be acquired at 15-second intervals vs. 20-second intervals previously. (The standard LOS cycle is comprised of one sky sample per blackbody sample and gain update.) 2. More flexible sampling strategy Multiple sky observations can be acquired during a LOS cycle, up to 1024 per gain update. This permits sky samples to be acquired at intervals of 2.67 seconds for improved temporal resolution of cloud liquid water variations and better coordination with the millimeter cloud radar during IOPs. 3. Separation of zenith LOS observations from TIP data When the radiometer is in TIP mode, the zenith LOS observations are now extracted, the PWV and LWP computed and reported separately in the output file. This eliminates the periods of missing LOS data during calibration checks/updates. 4. Automatic self-calibration The software now permits the calibration to be updated at specified intervals or continuously. In the first case, LOS mode is automatically changed to TIP mode at user-specified intervals or whenever clear sky conditions occur, the tip data reduced, the calibration updated, and the radiometer returned to LOS mode without operator intervention. In the second case, the radiometer is continuously is TIP mode until changed by the operator. 5. Graphical user display The graphical display is comprised of a status display, a message display, a temperature plot, a plot of the retrieved PWV and LWP, and (in TIP mode) a plot of the latest tip curves. |
| Measurements: | twpmwrlosC2.b1:
twpmwrlosC2.a1:
twpmwrtipC1.a1:
|